Computer-aided antenna feed design using Characteristic Modes

A new design technique that provides practical feed designs for arbitrary PEC structures is introduced. The technique requires minimal guidance from a human operator Using the information provided by a modal analysis, known as Characteristic Modes, allows us to construct a feed arrangements solution(s). From this solution(s), we can obtain the number, locations, and excitation voltages of one or more feed ports to excite a set of modes over some specified frequency range. The technique was applied to antennas and shows to provide highly realistic feed arrangements.